I have a similar KM macro. I also sometimes just set the User Agent set to iPad. You may have to enable the Developer menu in Safari (Prefs – Advanced – Show Develop menu) to allow this.

Here’s my KM script to switch User Agent to iPad:

Select Menu Item in Safari
Select: Develop ⇢ User Agent ⇢ Safari iOS 7 — iPad

It frequently works very nicely and saves the trip to Chrome. I still use Chrome for websites such as Hulu and when the Safari trick fails.